QUESTION 12 Polyprotic acids can act as acid-base buffers- O only in combination with polyprotic bases. o it their conce

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Question 12 Polyprotic Acids Can Act As Acid Base Buffers O Only In Combination With Polyprotic Bases O It Their Conce 1 (33.69 KiB) Viewed 44 times

QUESTION 12 Polyprotic acids can act as acid-base buffers- O only in combination with polyprotic bases. o it their concentration is kept very low. at pH values halfway between their pas at pH values around any of their pas at pH values around neutrality QUESTION 13 At its pk what percentage of boric acid is tonized? 50% 25% O 75% 100% 10% QUESTION 14 A stretch of double-stranded DNA contains 1000 baso-pairs (1 kb) and its base composition is 68% (A+T). How many guanine residues are in this DNA? O 32. 320 16 160. O 680 QUESTION 15 The sequence of a short peptide is EASY. Which of the following is its C-terminal amino acid? Glu Trp Arg Asn ОТут